The NIC is put in runtime suspend status when there is no cable connected. As a result, it is safe to keep non-wakeup NIC in runtime suspended during s2ram because the system does not rely on the NIC plug event nor WoL to wake up the system. After doing this, the s2ram could speed up the suspend/resume process a lot.
Chen Yu (2): e1000e: Assign DPM_FLAG_SMART_SUSPEND and DPM_FLAG_MAY_SKIP_RESUME to speed up s2ram e1000e: Remove the runtime suspend restriction on CNP+ drivers/base/power/main.c | 2 ++ drivers/net/ethernet/intel/e1000e/netdev.c | 21 +++++++++++++++++++-- 2 files changed, 21 insertions(+), 2 deletions(-) -- 2.17.1